The performance on the court is naturally not hard, and most Korean players are marginal international players. If they don't work hard, they may not have a chance to make the national team next time. In this case, the original skills and tactics have no absolute advantage, and there is no desire to compete. It is normal to lose completely.
Generally speaking, the top four in East Asia should be dominated by marginal international players or young players. Unfortunately, the Football Association obviously wanted to take this opportunity to make it, but it was hung up by someone else's second team.